Word equations- Please help ASAP

See answer below

Explanation:

In this case, you just need to use any acid you want (Like HCl, or H₂SO₄) to do this exercise.

You are given a sample of what you have to do which is:

Acid + metal > Salt + hydrogen

As you can see, an acid like the ones I wrote above, have hydrogen atoms, so you should put the hydrogen there. As for the part of salt, you just need to draw the corresponding salt that is formed when the acid reacts with the metal, and write it's name.

Let's do all three equations for you to a better understanding. For all the given examples, I will use HCl as acid, and i will explain one reaction cause the other two reactions happens the same thing, only with a different metal.

1. 2HCl + Zn > ZnCl₂ + H₂

As you can see, we just have a displacement reaction where the metal displaces the position of the hydrogen to form the salt and the hydrogen leaves the molecule as a gaseous molecule. Written in words it would be:

Hydrochloric acid + Zinc > Zinc chloride + hydrogen

2. 2HCl + Pb > PbCl₂ + H₂

Hydrochloric acid + lead > Lead (II) chloride + hydrogen

3. 2HCl + Fe > FeCl₂ + H₂

Hydrochloric acid + iron > Iron (II) chloride + hydrogen

Hope this helps

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.